Blast device.



PATENTED JULY 2. 1907.

R. L-WALKER- BLAST DEVICE- APPLIQATIOH rnnn JUN-E e. 1900.

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ATTORNEYS THE mmms PFTERS co, wAsnmnrou. n. c

PATENTED JULY 2; 1907.

R. L. WALKER.

BLAST DEVICE. APPLIOATION rum) JUNE 8. 1906.

2 SHEETS-SHEET 2.

ATTORNEYS I THE NORRIS PETERS pa wAsmNcroN, b. c

- A Z. wvmgori" UNITED STATES PATENT OFFICE.

ROBERT L. WALKER, OF NEW YORK, N. Y., ASSIGNOR, BY ASSIGNMENTS, TOMALCOLM GREEN, OF BOSTON, MASSACHUSETTS, AND JAMES N. OATLOW, OF NEWYORK, N. Y.,

TRUSTEES.

BLAST DEVICE.

Specification of Letters Patent.

Patented July 2, 1907.

Original application filed January 14, 1902, Serial'No- 89,647. Dividedand this application filed Tune 8, 1906. Serial No. 320.689.

To all whom it may concern:

Be it known that 1, ROBERT L. WALKER, a citizen of the United States,and a resident of New York city, borough of Brooklyn, county of Kings,and State of New York, haveinvented certain new and useful Improvementsin Blast Devices, of which the following is a specification, taken inconnection with the annexed drawings, forming a part of the same.

This invention relates to smoke consuming locomotives, and particularlyto the blast devices in the locomotive to insure at all times the properamount of air being supplied to the fire box, and is adivision of myapplication Serial No. 89,647, filed January 14, 1902, for smokeconsuming furnaces, patented May 22, 1906, No. 821,268.

In the accompanying drawings showing illustrative embodiments of thisinvention, and in which the same reference numerals refer to similarparts of the several figures, Figure 1 is a side elevation, partly insection, of a locomotive boiler. Fig. 2 is a vertical sectional viewthrough the blast valve. Fig. 3 is an end elevation of the locomotiveboilershowing the blast device and throttle in position.

In the illustrative embodiment of this invention shown in the drawings,A is a locomotive boiler having the steam dome, D, smoke stack B andexhaust nozzle 0, located beneath the smoke stack, and X designatescertain pipe and damper mechanism fully described and claimed in mypatent previously referred to and which forms no part of the presentinvention.

In order to insure at all times a sufiicient draft through the bed offuel in the firebox, it is desirable that when the engine is not beingoperated there shall be an induced draft maintained to insure a properpressure of air and to prevent the production of smoke when fresh coalhas been added to the fire. In order to accomplish this resultautomatically, I have the engineer open a connection from the boiler,permitting the steam to flow therefrom to the smoke stack, when heoperates the throttle lever to stop the engine. I preferably accomplishthis result by using a blast pipe 0-2 passing through the boiler andhaving its forward end G located teriorly threaded nipple l of the blastvalve cylinder M. This valve cylinder consists of a hollow casing havinga chamber 6 in communication with the passage M-6 of the threaded nipple7. One end of the chamber 6 is reduced to form a seat M for the valveM-3 which may be moved inward to its seat by a spring 5 nects thechamber 6 with the passage M7 which extends through the depending screwthreaded nipple 9. Mounted within the passage 8 and guided by the same,

is a valve rod M4 which passes through a suitable This rod M-4 at oneend contacts normally with the latch 0, having a foot piece 0-3, and atits other end carries the valve M3. This latch is pivoted upon the pivotM-9, on the upwardly projecting arm M-8 of the blast valve cylinder M,permitting the lower end of the latch to normally rest in the path ofthe throttle lever A-3. The nipple 7 of the cylinder M is connected tothe pipe M-ll, which at its other end is in communication with theinterior of the boiler, Fig. 1. The depending nipple 9 is connected tothe blast pipe C-2, which extends, as previously noted, from thecylinder M through the boiler to the interior of the exhaust nozzle O.It will be readily seen that when the valve M3 is moved from its seat M,steam from the boiler will pass through the pipe Mll, passage M-6chambers 6, 8 and M-7, blast pipe (3-2, to the exhaust nozzle G andthence up the stack B, producing an induced draft through the bed offuel upon the grate, not shown, of We locomotive.

Under normal running conditions, it is not necessary or desirable topermit steam to pass from the boiler through the blast pipe 0-2, assufficient air is supplied to the fuel bed by the exhaust steam of thelocomotive passing from the steam cylinders up through the exhaustnozzle 0 in the well-known manner. When, however, the locomotive isstopped at a station, there is no exhaust steam from the steam cylinderspassing up through the exhaust nozzle C and consequently, the draft uponthe bed of fuel is materially lessened.

By my invention, the engineer in shutting off the steam from hisoperating cylinders by means of the throttle lever A-3, automaticallycauses the throttle A-3 to engage with the latch O which in turn pressesupon the rod M-4, forcing the valve M-3 from its seat M against theaction of the spring 5, and the steam pressure, permitting the steamfrom the boiler to pass directly to the exhaust nozzle O by means of theblast pipe 0-2, thus insuring a proper induced draft which may beregulated by valve M-lO controlling the amount of steam passing from theboiler to the stack. Although for some purposes it is desirable toalways have the enigneer automatically throw on the induced draft whenhe stops his locomotive, I arrange my latch 0 so that the blast valve ifdesired will not be operated at-the next movement of the throttle leverA 3 to stop the train. This I accomplish by pivoting the latch 0 abovethe throttle lever so that it can be drawn out into the position shownin dotted lines and designated 0. At no time can the latch 0 be liftedabove the other position shown in dotted lines and designated O2, onaccount of the foot 0-3 engaging with the bracket M-S. By thisarrangement when the latch O is withdrawn from operative relation withrod M4, so that it is in the position shown by dotted lines designated Oand engaging with the surface M of the throttle lever A-3, the throttlelever can be operated without affecting the rod M-l, which controls thevalve M-3. It is to be noted, however, that at the next outward movementof the throttle lever A 3, to start the locomotive, the surface lei(Fig. 2) will pass beneath the end of the latch 0, when the latch willimmediately swing upon its pivot M-9 until it contacts with the rod M4-.It will then be in an operative position to be engaged by the surface13, of the throttle lever A-3, causing the induced draft to be broughtinto operation when the throttle lever is next moved to stop thelocomotive.

Having thus described this invention in connection with severalillustrative embodiments thereof, to the details of which I do notdesire to be limited, what is claimed as new and what it is desired tosecure by Letters Patent is set forth in the appended claims.

1. In a locomotive furnace, a blast pipe, an automatic blast valveadapted to automatically engage a seat to close said valve, a pivotedlatch, the stem of said valve lying in the path of the pivoted latch, athrottle lever adapted to automatically actuate the latch. said latchbeing manually movable out of the path of the throttle lever.

2. In a locomotive furnace throttle lever, automatic means cooperatingwith the throttle lever to cause an in duced draft in said furnace, saidmeans being adapted to be thrown into an inoperative position.

In a locomotive furnace, an induced draft mechanism including a valveand a pivoted latch adapted to control the same, a throttle lever toautomatically operate the latch, said latch being adapted to be removedbodily into an inoperative position in relation to the throttle lever.

4. In a locomotive furnace, means for producing an induced draftincluding a valve and a movable member adapted to control the same, athrottle lever adapted to actuate the movable member, means forregulating the amount of induced draft, said movable member beingadapted to he moved bodily out of operative relation to iho throttlelever.

In a locomotive furnace having an induced drali. mechanism, a blastvalvecylimlcr comprising a hollow body portion and a plurality ofnipples. an upwardly extended arm. a latch pivoted upon the same andadapted to actuate the valve. a valve and rod mounted within (hecylinder and controlling the passage bciwcon two of ihe nipples, meansfor supporting the cylindcr in opcraiivc relation to the throttle lever.(he ihroiilc lcvcr adapted to actuate the latch and conncciions from thecylinder to the boiler and stack.

(3. In a locomotive furnace. a plate secured to iho furnace and having ahollow threaded nipple. a hlasl valve cylinder comprisinga hollow bodyportion having :1 plurality of hollow nipples. one of which cooperateswith the hollow nipple upon the plaic to suppori the cylinder inposition, a valve and stem controlling the p; hoiwccn two other nipples.the sicm passing" through :luoihcr nipple. a suitable packing for therod in this nipplc. an up wardly extending" arm. a latch pivoicd lo thesamc and normally adapted to contact with the end of tho valvo stem andsteam connections from iho boiler to ono of [he nipples and from one ofthe other nipples io ihc smolustack.

7. In a locomotive furnace. means for producing an in duced draftincluding a valve :1 pivoted latch to control the same and having :1foot adapted to limit the movcmcni upon its pivot, and a ihroiile lcvcradapted to coo wralc with the latch.

S. In a locomotive furnace, a blast valve cylinder con nectcd with iheboiler and the smoke stack. a valve and rod within the cylinder. :1throttle lever and means between the rod and throttle lever adapted tonormally actuate the valve when the throttle lever is thrown in oneposition but which is adapted lo be temporarily moved bodily into aninoperative position with relation lo the rod and the throttle lever.

t). In a locomotive furnace, means to produce an induced draftautomatically when the locomotive is stopped. a part of said induceddraft mechanism being adapicd to be thrown temporarily into aninoperative posilioll with relation to the throttle lever but whichautomatically rc turns to its operative position when the throttle leveris next moved to start the locomotive.

10. In a locomotive furnace, a throttle lever, auiomaiic meanscooperating with the throttle lever lo causc an induced draft from saidfurnace said means having iwo pd sitions, a normal operative one and aninoperative om. said means when in its inoperative position beingadapted to automatically move into its operative position upon the nextmovement of the lhrolilc lever to start the loci motive.

ROLER'L L. WALKER.

Witnesses JOHN L. BnowN, l\IALCOLi\l Grimm.

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